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Temporal-spatial oceanic variation in relation with the three typical Kuroshio paths south of japan

Acta Oceanologica Sinica 2022年第2期41卷 15-25页

作者： Xiaobo Wu Yanling Zhao Guijun Han Wei Li Qi Shao Lige Cao Chaoliang Li School of Marine Science and Technology Tianjin UniversityTianjin 300072China The PLA 31010 Units Beijing 100081China Tianjin Key Laboratory for Oceanic Meteorology Tianjin 300074China

Empirical orthogonal function(EOF)analysis was applied to a 50-year long time series of monthly mean positions of the Kuroshio path south of japan from a regional *** leading EOF modes characterize the contributions from three typical paths of the Kuroshio meander:the typical large meander path,the offshore nonlarge meander path,and the nearshore non-large meander path,***,the spatial variation characteristics of oceanic anomaly fields can be depicted by their regression fields upon the associated three leading principal components(PCs),which are well-matched with the results of composite analysis corresponding to each period of the three typical Kuroshio paths.A new index for the typical large meander is defined by using the second leading PC,which is highly correlated with the Kushimoto-Uragami *** analysis of this new index series shows variability of the Kuroshio path south of japan at time scales of about 7–8 years and 20 years.

关键词： Kuroshio path south of japan empirical orthogonal function analysis temporal-spatial oceanic variation large meander index

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Multi-satellite observations of chlorophyll-a blooms south of japan triggered by Typhoon Namtheun(2004)

Multi-satellite observations of chlorophyll-a blooms south o...

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第27届中国气象学会年会大气物理学与大气环境分会场

作者： Tao Xian 1,Yuan-Jian Yang 1,2,Liang Sun 1,* and Yun-Fei Fu 11 Laboratory of Atmospheric Observation and Climatological Environment,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,Anhui,230026,China12 Anhui Institute of Meteorological Sciences,Hefei 230031,China Laboratory of Atmospheric Observation and Climatological Environment,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,Anhui,230026,China

Chlorophyll-a(Chl-a) blooms caused by typhoon Namtheun(2004) were investigated by combining multi-satellite observations with Argo float profiles and ship-based *** Namtheun-induced upwelling and vertical mixing caused extreme sea surface cooling(-4°C) and significant Chl-a blooms(0.1.3 mg/m3),while persistent high magnitude was co-located with the pre-existing cyclonic circulation(SSHA <-100 cm).The results indicate that both the typhoon’s translation speed and pre-existing cold eddy may play important roles in enhancing the Chl-a *** study implies that to gain deeper insights into ocean surface responses to typhoons,their subsurface dynamics need to be analyzed through more in situ and satellite-based observations and physical and biological models.

关键词： Chlorophyll-a bloom south of japan Typhoon Namtheun

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